linux-kernel - [PATCH] ASoC: pxa: pxa-ssp: Remove redundant null check before clk_prepare_enable/clk_disable

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Message-Id: <20201029090104.29552-1-vulab@iscas.ac.cn>
Date:   Thu, 29 Oct 2020 09:01:04 +0000
From:   Xu Wang <vulab@...as.ac.cn>
To:     daniel@...que.org, haojian.zhuang@...il.com,
        robert.jarzmik@...e.fr, lgirdwood@...il.com, broonie@...nel.org,
        perex@...ex.cz, tiwai@...e.com,
        linux-arm-kernel@...ts.infradead.org, alsa-devel@...a-project.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: pxa: pxa-ssp: Remove redundant null check before clk_prepare_enable/clk_disable_unprepare

ecause clk_prepare_enable() and clk_disable_unprepare() already checked
NULL clock parameter, so the additional checks are unnecessary, just
remove them.

Signed-off-by: Xu Wang <vulab@...as.ac.cn>
---
 sound/soc/pxa/pxa-ssp.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c
index c4e7307a4437..b941adcbb8f9 100644
--- a/sound/soc/pxa/pxa-ssp.c
+++ b/sound/soc/pxa/pxa-ssp.c
@@ -99,8 +99,7 @@ static int pxa_ssp_startup(struct snd_pcm_substream *substream,
 		pxa_ssp_disable(ssp);
 	}
 
-	if (priv->extclk)
-		clk_prepare_enable(priv->extclk);
+	clk_prepare_enable(priv->extclk);
 
 	dma = kzalloc(sizeof(struct snd_dmaengine_dai_dma_data), GFP_KERNEL);
 	if (!dma)
@@ -124,8 +123,7 @@ static void pxa_ssp_shutdown(struct snd_pcm_substream *substream,
 		clk_disable_unprepare(ssp->clk);
 	}
 
-	if (priv->extclk)
-		clk_disable_unprepare(priv->extclk);
+	clk_disable_unprepare(priv->extclk);
 
 	kfree(snd_soc_dai_get_dma_data(cpu_dai, substream));
 	snd_soc_dai_set_dma_data(cpu_dai, substream, NULL);
-- 
2.17.1